Method for comparing four-slap fingerprint based on feature point set segmentation and RST invariant features

A feature point set, feature point pair technology, applied in character and pattern recognition, instruments, computer parts and other directions, can solve problems such as low accuracy, complex algorithm, poor real-time performance, etc.

Active Publication Date: 2015-06-03
HANGZHOU JINGLIANWEN TECH
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Problems solved by technology

[0004] In order to overcome the disadvantages of complex algorithms, poor real-time performance, and low precision in the comparison of the existing joint-finger graphs, the present invention provides a simplified comparison process with good real-time performance and high precision. Quadruplet comparison method based on feature point set segmentation and RST invariant features

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  • Method for comparing four-slap fingerprint based on feature point set segmentation and RST invariant features
  • Method for comparing four-slap fingerprint based on feature point set segmentation and RST invariant features
  • Method for comparing four-slap fingerprint based on feature point set segmentation and RST invariant features

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Embodiment Construction

[0052] The present invention will be further described below in conjunction with the accompanying drawings.

[0053] refer to Figure 1 to Figure 8 , a quadruple-finger comparison method based on feature point set segmentation and RST invariant features, comprising the following steps:

[0054] 1) Carry out the cutting based on the statistical histogram of the set of co-reference feature points;

[0055] 1.1) Calculate the statistical histogram of the quadruplet finger feature points with respect to the X coordinate. Since the joint finger image is much larger than the general fingerprint image, as shown in the reference figure 2 . Especially when taking pictures with a high-resolution scanner or a high-definition camera, the value of the X coordinate of the feature point is relatively large, which can reach more than 2000. For example, refer to image 3 . In order to speed up the processing speed and facilitate the calculation, when the histogram of the X coordinate is ...

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Abstract

The invention discloses a method for comparing four-slap fingerprint based on feature point set segmentation and RST invariant features. The method comprises the following steps: (1) segmenting the slap fingerprint feature point set based on a statistical histogram; (2) further screening feature points of each finger to select effective feature points; (3) comparing the single fingers, namely firstly establishing a nearest neighbor feature structure of a 12-point cycle through a single finger comparison method based on the RST invariant features, then primarily checking the feature points and lastly verifying the triangle similarity; (4) recognizing the feature point set of N fingers of a four-slap fingerprint sample A and the feature point set of M fingers of the four-slap fingerprint sample B by using the single finger comparison algorithm used in the step (3) to obtain the similarity between A and B; (5) judging whether the four-slap fingerprint samples A and B come from a same hand or not according to the similarity obtained in the step (4). The method for comparing the four-slap fingerprint based on the feature point set segmentation and the RST invariant features is simple in comparison process, good in instantaneity and high in precision.

Description

technical field [0001] The invention relates to the technical fields of image processing, feature selection, fingerprint comparison, etc., especially a method for segmentation, screening and comparison of four-finger feature point sets, which can be used for quadruple fingerprints obtained by a multi-fingerprint collector. Fingers, four fingers coated with ink pad and scanned on A4 paper, quadruple fingers captured by mobile phone or camera. Background technique [0002] With the continuous improvement of image processing and pattern recognition technology, fingerprint recognition technology is widely used in people's production and life. At present, the single fingerprint identification technology is relatively mature; however, according to the matching index principle in the process of fingerprint identification, there will inevitably be some false recognition rate and false rejection rate in the single fingerprint identification process, which will affect life and product...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06K9/00G06K9/34
Inventor 张永良黄聪敏
Owner HANGZHOU JINGLIANWEN TECH
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